Why Does My Python MySQL Stored Procedure Throw a \'Commands Out of Sync\' Error, and How Can I Fix It?

Error: "Commands Out of Sync" in Python-MySQL Stored Procedure

When attempting to execute multiple statements within a MySQL stored procedure called from Python, you may encounter the "commands out of sync; you can't run this command now" error. This issue typically arises when executing a second statement after calling a stored procedure.

Resolution

To resolve this error, it is necessary to close the cursor after calling the stored procedure and open a new one before executing subsequent statements. This breaks the connection between the cursor and the stored procedure, allowing you to perform other operations without conflicts.

Here's an updated block of code that incorporates this solution:

cursor.callproc('my_mysql_procedure', [some_id,])
result = cursor.fetchall()
for r in result:
    do something

cursor.close()  # Close the cursor after stored procedure execution

cursor = connection.cursor()  # Open a new cursor
cursor.execute("select * from some_table")
result = cursor.fetchall()

By closing the cursor and reopening it immediately after retrieving results from the stored procedure, you can effectively reset the cursor's state and enable the execution of additional statements without triggering the "commands out of sync" error.

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